FI110560B - Group setup for wireless communication terminals - Google Patents

Description

110560

Create a group for wireless communication terminals

Background of the Invention

FIELD OF THE INVENTION The invention relates to a group communication method and apparatus and to a method for forming a group of terminal equipment.

Description of the Related Art

Electronic devices will become smaller, lower in power requirements and cheaper, and personal information and communications applications will be added to the chassis. Such devices include cellular telephones, personal digital assistants (PDAs), pocket video games, and pagers. The PAN (Personal Area Network) concept is known to illustrate how electronic devices on or near the human body can exchange digital information by capacitively switching small currents through the body. A low frequency carrier 15 wave is used here. The PAN prototype system allows users to exchange electronic business cards by hand.

PAN devices are used for wearing articles. These include watches, credit cards,: ··: eyeglasses, identification signs, belts, waist packs and shoe attachments.

; Headset PANs include headphones, hearing aids, microphones and. 20 distance displays. Shirt pocket PAN devices serve as identification tags. Wristwatch ·,: The clock serves as a location for the display, microphone, camera and speaker.

PAN devices containing sensors allow medical monitoring of body functions (heart rate, blood pressure and respiratory rate). Wallet PAN devices store information and identify the holder. The shoe-mounted devices have independent power supply and enable data connection to remote PAN devices: located on workstations and floor transponders that indicate the location and identity of people.

* ♦ * • ·· · As a result of technological developments in telecommunication systems, system users have access to various systems and services. These systems include cellular -: **: 30 telephone systems that provide cellular services. Cellular telephone systems provide services that enable subscribers to these systems to improve their availability and reach, potentially at all times, and as long as users remain within the service areas covered by their systems.

In a cellular system, a person who wishes to contact a cellular subscriber simply dials the cellular subscriber's telephone number to contact the subscriber on a t-5 wide cellular telephone. As long as the cellular subscriber keeps the cellular telephone switched on, the subscriber can be reached when within the coverage of the cellular system.

Normally, the system connects a call between a cellular telephone or a so-called mobile terminal and another PSTN subscriber of a mobile terminal or public telephone network 10. Selecting a mobile terminal or a similar subscriber number connects the call to this particular mobile terminal. In group voice calls, the whole group is called by a single dialed number, i.e. a short number. A group call is a conference call where all participants can talk and hear each other in turn. An individual mobile radio may belong to a plurality of groups programmed into this radio. The system maintains a file of the access points associated with the group number of each group. A group call may cover one, several, or all base stations within a mobile switching center or multiple mobile switching centers.

Some cellular networks include a short message service, e.g., SMS is a two-way service in GSM for short alphanumeric messages or for data in a similar format. With the SMS service, it is possible to deliver the message to the mobile terminal even during the established call and deliver the message. ·: Noma using the so-called store-and-forward service, where the message is stored in the ',' ·· network if the mobile terminal is unavailable and forwarded 25 shortly after the mobile terminal can be reached again. Conventional ·, ***: In the GSM system, data services are based on circuit-switched technology, providing a maximum data transfer rate of 9.6 kbit / s for transparencies and non-transparent networks; copying services for data transmission. With the increasing amount of data, ·· 'has also been born. the need for higher transmission rates, so that the GSM system is developed to include an extension of the so-called General Packet Radio Service (GPRS) service as a packet switched data service.

I I

110560 3

SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide user group communication and to provide a method and terminal for group communication and group formation between users based on physical contact between users.

According to the invention there is provided a wireless communication terminal and a method for creating or forming a group.

According to a first aspect of the invention, there is provided a method of establishing a group of at least two wireless terminals for wireless group communication between these at least two wireless terminals, comprising the steps of: physical contact of users of at least two wireless terminals; detecting physical contact between at least two users of the wireless terminal; and establishing a group of these at least two wireless terminals for group communication between the at least two wireless terminals of this formed group over the wireless connection.

According to another aspect of the invention, a wireless communication terminal is provided for group communication with at least one other wireless terminal, the terminal comprising: 20 detecting elements for detecting physical contact between a wireless terminal user and at least one other wireless terminal user; participation means for establishing a group of wireless terminals and at least one other wireless terminal for group communication by wire; at least one other wireless terminal set up over a connection. With 25 devices; and • a transceiver for implementing wireless group communication, whereby ···. at least one wireless terminal and at least one other wireless terminal in the formed group.

Preferably, this wireless communication connection is a low power radio frequency connection, such as a Bluetooth connection. The group formation is stored in the memory of each terminal 110560, whereupon activating group communication, such as making a group call or exchanging a group message in the form of text messages or pictures to be sent to the whole group, can be done by activating the group message to this particular group. The memory may be arranged in the same way as the telephone directory in the mobile phone 5 or as known as the Contacts directory in, for example, Nokia 9110 communicators.

In one embodiment of the invention, the proximity of wireless terminals using wireless communication is also detected. Detecting proximity to wireless terminals includes entering a group creation mode in ai-10 in each of two wireless terminals. After the user enters this state, the method includes asking for proximity to the wireless terminals using wireless communication to send a message from the wireless terminal that has first entered this state to the second wireless terminal that has entered this state. The message includes information about the first wireless terminal initiating the process, and may also include information about creating a group. Preferably, the transition to the group creation mode includes contacting the electrode placed on or in communication with the terminal. Entering the group creation mode may also involve selecting a mode from the wireless terminal menu or pressing a specific button. 1 2 3 4 5 6

In one embodiment of the invention, the detection of physical contact between the users preferably includes: signal transmission to the users of the wireless terminals. physical contact using the first circuit in the wireless 3s. This transmitted signal is generated in a signal transceiver, 4 »7 ♦ 5, as in a PAN transceiver. The generated signal is transmitted to the body of the first 6 users from an electrode connected to the signal transceiver and to the body of the second user when the users are in physical contact. The transceiver in the second user's wireless terminal detects this generated signal. Similarly, the signal is possibly received through the bodies of other physically contacted users to their respective '30 transceivers in their terminals by touching the electrode in their terminals. Preferably, the signal is a low frequency signal, e.g., less than one megahertz. Physical contact may include handshaking. It may also include other types of contact between users allowing the signal to pass • between users. The establishment of a group of 35 users physically in contact with the wireless terminals may be confirmed using a message which may be transmitted using wireless communication.

7 110560 5

According to the invention, a wireless terminal is provided which enables users to establish group communication. The wireless terminal includes a first circuit or transceiver connected to a central controller of the terminal. This first circuit is used to communicate between at least two users of the wireless terminal to form a group when there is physical contact between these users. The wireless terminal includes another circuit or transceiver connected to a central controller. This second circuit is for a group formed of at least two wireless terminals for wireless group communication.

The second circuit is preferably a short-range radio transceiver. Preferably, the first circuit 10 is a PAN transceiver and a group creation electrode. The first circuit may include a switch to trigger the communication. The switch can also be a trigger for group creation. The central controller may include a processor (CPU), memory, input, and output. Physical contact between at least two users (multiple users can form a group) can be a handshake between people. The physical contact 15 may also be another type of user-to-user contact that allows the signal to travel between users. Thus, physical contact can be any contact between users that allows a small electrical current to pass from the first body of the first user to the second body (s) of the second user (s). Physical contact can also be any contact where the body can exchange digital information by capacitively switching small currents through the body. The signal may be a low frequency signal which may be an electric current.

• M

»,, ·. For a better understanding of the present invention and its other and further objects, reference is made to the following description, taken in conjunction with the accompanying drawings. '. and the scope of the invention is set forth in the appended claims.

25 Brief Description of the Drawings t I f

In the drawings:, i

The method and device according to the invention will be explained in more detail by means of preferred embodiments with reference to the accompanying drawings, in which: Fig. 1 shows a communication group in an embodiment of the invention, wherein users 30 may form a group; FIG. 3 illustrates a block diagram of an embodiment of the invention, FIG. 4A illustrates a block diagram of an embodiment of the invention, FIG. Figure 6 illustrates a group formation flow diagram, Figure 7 illustrates a group formation signaling diagram, 10 Figure 8 illustrates an example of a menu is shown on the display of the communication terminal when the group creation mode is selected, Figure 9 shows an example of how the display informs about the terminals that are forming a group.

Detailed explanation of the recommended forms

In the example of Figure 1, the wireless terminals form a communication group. User 100 has a wireless terminal 300. The group has at least 2 but preferably multiple wireless terminals, e.g. wireless terminals: .i. '300, 301 and 302. Wireless terminal 300 may be, for example, a mobile station, a PDA.

• (Personal Digital Assistant), a laptop or other terminal equipped with: • a short-range radio transceiver or a low-power radio transceiver. The hands 101 (111 and 121) of the user 100 (110 and 120) may be used to create a group for transferring a signal between users when the users have a physical connection. One of the wireless terminals, eg wireless headset, ·. =. The device 300 may serve as a master, which may have administrative tasks in creating the group. Once the group is created, a wireless network or link for wireless group communication between the wireless terminals 300, 301 and 302 is used.

, | · ·. * · ·. The example of Figure 2 illustrates physical contact 200. Users 100, 110, and 120 are in contact with one another to establish a physical contact 200 between users 100, 110, and 120. The physical connection 200 preferably enables the transmission of signal V *: 30 to users 100. , 110 to 120 by capacitively switching small currents (pike amperes) through the body as a result of contact. The signal source may be a 110560 7 PAN transceiver that is in contact with an electrode that is affected by one of the users (or similarly, the signal may be received by a PAN transceiver that is in contact with another user via the electrode). For example, the signal or signals may be transmitted via physical contact 5200 between user 100 and user 120, in which case only users 100 and 120 are included but user 110 is omitted. The signal or signals may also be transmitted via physical contact 200 between all users 100, 110 and 120 in any combination of users, such as through a chain contact. For example, the signal could be transmitted from user 100 to users 110 and 120 simultaneously. In another example, the signal may be transmitted from user 120 through physical contact 200 to user 100. Physical contact 200 may be, for example, handshaking, touching another user's body on another user's skin, or any other user contact where the human body can exchange digital information by capacitively switching (picampires) through the body. User 100 may hold wireless terminal-15 device 300. User 100 may also press an electrode located on or connected to terminal 300 (e.g., a wire is a finger sensor that can be held by the user) with his or her finger to transmit a signal to his or her body the body. Similarly, the user 120 may hold the wireless terminal 302 and hold the finger at the electrode or sensor 20 which receives the signal transmitted from the terminal 300 electrode. Alternatively, the user 120 may have an electrode or sensor connected to his body (e.g., the chest), whereby this electrode is wired to the terminal 302. A locally user intended to participate in the group being formed should contact the terminal electrode while in contact with another user. with the signal being transmitted from one terminal (electrode) and received at the other terminals (their respective electrodes) using the users as the signal transmission medium. Thus, the user 110 would also have to touch the terminals - * “*: electrode of his or her own to become a member of the group while in physical contact with other users 100 and 120.

The block diagram of the wireless terminal 300 is shown in the example of FIG. Of course, the implementation of the wireless terminals 310 and 320 may be the same. Wireless: The terminal 300 may have a short-range radio communication circuit or transceiver- »» * *

, ···. I took what is called the second district here. This second circuit is, for example, LPRF

(Low Power Radio Frequency) Transceiver 310, such as a Bluetooth Transceiver I * *: * '35 Receiver which uses an antenna 320 connected to transceiver 310 with a radio link

»J

for radio transmission over information. In addition, the wireless terminal may have another antenna (not shown) that may be used to transmit information other than short-range radio communication, such as an antenna for communication over a cellular mobile network. In this way, wireless group communication could take place over a cellular network or via short-range rf communication. If the short-range radio communication and the cellular radio-5 network have the same frequency, a common antenna could be used. The central controller CC 330 is coupled to the LP transceiver 310. It may include components used to control and operate the wireless terminal 300, such as a central processing unit (CPU) 331, RAM 332, Input / Output (I / O) electronics 333, and is connected to a user interface 334 comprising, for example, a keyboard and a display.

In addition, a PAN transceiver 340 is connected to the central controller 330. In the following, the PAN transceiver is referred to as the first circuit. In addition to the PAN transceiver 340, this first circuit may include a group creation electrode 350. The PAN transceiver 340 may also be used to transmit and receive signals that are transmitted through human bodies, and possibly through physical contact 200. The array creation electrode 350 may be used to connect a human body surface, such as a finger, to connect, for example, a first PAN transceiver (located e.g. in wireless terminal 300 in Figure 2) and a first user body to a second user body and thus a second PAN transceiver 30 (e.g. 2). The ground may be used to form a circuit that may allow signal (current) transfer between users.

,. This return path, earth, may include conductors and dielectric devices in the vicinity of the PAN transmitters. The earth may be electrically isolated, to prevent short circuiting of this communication circuit. Preferably, the 300 v 25 wireless terminal also includes a power source, such as a rechargeable or removable battery 370.

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Preferably, the user interface 334 of the wireless terminal 300 includes control buttons for controlling other functions of the terminal, for example, navigating a menu or selecting icons, and for displaying messages and information relating to the grouping of the display and the ongoing group communication.

'* * 30 The example of FIG. 4A illustrates an embodiment of the PAN transceiver 340 »> * a ·. In this example, the controller 342 is coupled to the transceiver 343 and the switch 344. The controller 342 may touch the transceiver 343 to send a signal and may activate the transceiver 343 to either transmit or receive a signal. The switch 343 is used to indicate to the controller 342 that it must touch the transceiver 343 to transmit and receive. Switch *. The '344 is coupled to the electrode 350. The electrode 350 may be a shank 1a connected to the switch 344. As electrode 350 moves over the trigger level of switch 344, switch 344 notifies 110560 9 to controller 342 that it should instruct transceiver 343 to turn on to send and receive a signal. Switch 344 may have a reversing force, such as a spring, that puts electrode 350 into a standby state, e.g.

The example of Figure 4B illustrates another embodiment of the PAN transceiver 340 '. In this embodiment, the controller 342 is coupled to the transceiver 343. The controller may set the transceiver 343 to transmit a signal or it may activate the transceiver 343 to either transmit or receive a signal. In this embodiment, the electrode 350 is directly coupled to the transceiver 343. The electrode 350 may also be connected (not shown) to the controller 342. The PAN transceiver 340 'may now be touched or activated to transmit a signal applied to a person's body through the electrode 350. Activation can be accomplished by detecting user contact with the electrode, which could be accomplished, for example, by detecting a change in capacity at the electrode by the controller 342. The signal 15 transmitted from the electrode 350 is, for example, a ping signal. The ping signal is a low frequency signal (less than one megahertz), for example, an AC pulse of about 100 to 1000 kHz. The signal length is such that it can be transmitted and detected. The low frequency carrier is used so that no energy is propagated, which minimizes interference from remote listening and nearby PANs. 1 The transmitted ping signal may be used for querying or pinging information by transmitting it from the first wireless user device to the second:: wireless user device (there may be more users and terminals than .Y: only two). The purpose of sending a ping signal is to prepare for another; communication so that communication from another circuit, such as Bluetooth, does not require • ·. ··. 25 no queries or extra queries when commencing communication. This will speed up the · · · ··. Bluetooth communication and establishing a connection do not consume Bluetooth bandwidth. The example of Figure 5 illustrates the contents of a ping signal. The signal includes an identifier of the transmitting transceiver, such as the address of another circuit, for example a Bluetooth address 501. Typically, each of the Bluetooth transceivers ··· '30 is allocated a unique 48-bit Bluetooth device address (BD ADDR). This • signal may also, though not necessarily, include a clock offset 502. Clock,, | · Offset 502 is used to synchronize with other units. This signal may also, although not necessarily, include a device class 503 as is known by: · Bluetooth. The device class 503 may be a 24-bit field containing its one, 35 device class transmitting a Frequency Hop Synchronization (FHS) packet. Kel-110560 10 lo offset 502 and device classes 503 are used to make communication more efficient. However, they are not essential to the procedure.

An example of Fig. 6 is a flow chart illustrating the steps of group formation. The user 100 (by way of example, the user 100 and the terminal 300 shown in Figs. 1 and 2 are selected) can enter the group creation mode of the wireless terminal 300 (step 600). The user 100 enters the group creation mode by touching or pressing the electrode 350. Alternatively, the user 100 can enter the group creation mode by selecting the mode from the menu of the wireless terminal 100. The user terminal 300 asks for other terminals that may be present, such as the wireless terminals 301 and 302 (see FIG. 1) that are in the vicinity (step 610). The user terminal 300 sends a message to the terminals located within the operating range of the terminal, such as the terminals 301 and 302, by transmitting a second circuit (i.e., preferably over Bluetooth). The wireless user terminal 300 transmitting the first request message may be designated as a master. In step 620, the host terminal 15,300 receives a response message from devices capable of forming a group and located within range. The host terminal selects at least one of the terminals 301 and 302 and transmits over the wireless link a message informing the terminals 301 and 302 over the wireless link. and. 302 (step 630), such as a ping signal. Physical contact 200 may be, for example, handshaking, touching another user's skin with a finger, or any other contact between users that may cause a current (signal) to pass between the user's bodies. Through this physical contact, an electrical circuit is formed that allows a picameter-class signal to pass from the transmitter of the first circuit of the host user (100) through the body of the host user (100) to the second user (s) (110 and / or 120) to the body and the receiver (s) of the second / other user (s) (301 and / or 302), such as the PAN transceiver 340 in the terminals 301 and 302. In this step, ·> ·. 30 users 100, 110 and 120 and electrodes 350 are connected. Part of the user's body T, such as a finger, should touch the group creation electrodes 350 at this point (step 630). This process step can really confirm that there is a physical contact 200 between the users of the group (or the users forming the group). The user terminals detect and register the received signal. The host-35 terminal 300 sends an inquiry to each of the wireless terminals (301 and / or 302) to ensure that each terminal (involved in group formation preparation in step 610) has successfully received the ping signal (step 1105601140). If a wireless terminal (301 and / or 302) has not received a ping signal, the host 300 sends to this terminal a request to transmit a signal (step 650) or confirms that this terminal does not wish to participate in this group. If a particular terminal has not responded by sending a message (via wireless communication) 5 to the host 300, this terminal is excluded from the group (or it may be separately agreed by separate wireless communication between the host and this terminal to become a member of the group). The host 300 may continue the loops of steps 640 and 650 until the pinging process is determined successful based on responses from other terminals. After the host 300 has polled all the wireless terminals 10, the group is formed using communication over another circuit (step 660). In step 670, the host 300 informs other wireless terminals (310 and / or 302) of the successful establishment of the group, preferably using second-circuit communication. Once the group is formed, the group information is stored in the memory of the central controller CC, such as a group directory such as a telephone directory.

The example of Figure 7 shows a signaling scheme for forming a group. In this example, the user terminal node 700 (i.e., the first wireless user terminal) transmits a message 720 using a second circuit of the terminal (e.g., Bluetooth). This message contains information about group formation and may further include information about the transmitter, protocol, devices, etc. Another user terminal node 20 710 (i.e., another wireless user terminal) receives and detects the message at the same time. like using another circuit of another user terminal. The users then establish a physical contact between them 200. The user terminal node 710 then transmits the signal 740 to the physical terminal contact 700 of the user terminal node 700 via the first circuit. The user terminal node 700 receives the following: · 25 signals through physical contact 740 and detects it using a first circuit (e.g., a PAN transceiver). The user terminal node 710 then transmits a ':' message 750 to the user terminal node 700 to acknowledge the group formation.

In one embodiment, group formation does not require physical contact of all users simultaneously, but in stages. For example, suppose that the wire -'... · 30 ton terminal (a) transmits a ping signal received in the wireless terminals (b) and (d) but not in the wireless terminal (c). Next, wireless. '* ·. the terminal (c) transmits a ping signal which is received and detected in the wireless terminals (b) and (d) but not in the wireless terminal (a), whereby there is no direct connection between the terminals (a) and (c). contact. However, since there is a connection between the wireless terminals (a) and (c) to the wireless terminals (b) and (d), there is an indirect connection between the terminals (a) and (c) indicating the formation of the group. Thus, all four terminals (a) - (d) are forming a group even though not all users are in physical contact at the same time but at different times.

The order and number of signals and messages may vary. For example, users 5 may physically come into contact with each other 200, whereby a first wireless terminal transmits a signal on a first circuit (PAN) and a group may be formed based on the trigger signal transmitted by the PAN transceiver. Alternatively, the first wireless terminal may send a message using the second circuit and the second wireless user terminal will receive it via wireless communication (Blue-10 tooth) and the users will then physically touch 200 and send the group creation signal to the first wireless terminal (PAN). The first wireless terminal receives the group creation signal and confirms the group creation by sending a confirmation signal to the second wireless terminal using a second circuit (Bluetooth). In the second example, the first wireless terminal 15 can send a message using the second circuit, and the second and third wireless terminals receive and respond to the message. The second wireless terminal can now transmit a signal to the first and third wireless terminals through physical contact 200 established between the users of the wireless terminals. Once the signal is transmitted, the wireless terminals may communicate several messages between themselves using a second circuit and eventually the group may be formed and communication may begin.

i * »·: The example of FIG. 8 illustrates a menu, Y, displayed on the wireless terminal display when the user selects a group creation mode. The wireless user device 300 has; γ: preferably a user interface 334 'having a display showing the menu to the user.

• ·. ···. For example, a text menu may be displayed where the "form group" command indicates that the user wants to create a group. The command '' others' may indicate the selection of a command other than group formation, such as short range. network settings.

· * Y When '' form group '' is selected in the menu and the user presses the select button (part; 30 interfaces 334 '), the wireless terminal 300 sends a query message and the formation of the group' L, 'proceeds as described above,

The example of Fig. 9 shows information about terminals that are forming a group. In this situation, the text "BT1 BT2 BT3" "form a group?" May be displayed. This text informs the user that wireless terminals 1, 2 and 3 can form a group. The user now acting as the host can decide whether he / she wants to 110560 13 form a group. The user can also decide whether he wants to exclude a terminal from the group. The user of the host terminal may also have the right to cancel the group formation.

Although described herein as what is believed to be a preferred embodiment of the invention, it will be appreciated by those skilled in the art that changes and modifications thereof may be made without departing from the scope of the invention.

For example, the identifier used in the signal may be a telephone number or IMEI (International Mobile Equipment Identity) and the second circuit and still another circuit within the group may be GSM (Global Packet Radio), GPRS (General Packet Radio) or UMTS (Universal Mobile Telephone System).

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Claims (25)

A method of forming a group consisting of at least two wireless terminals for a wireless group communication between these at least two wireless terminals, the method comprising steps in which: these at least two wireless terminals are brought into physical contact; The physical contact is detected between the users of these at least two wireless terminals; and a group of these at least two wireless terminals is formed for group communication. which occurs between the at least two wireless terminals of this formed group. ', over a wireless connection. * * · li »* (M ',, 2nd The method of claim 1, further comprising the step of using: v. being brought into physical contact comprises a step in which the proximity of these at least two '. '. wireless terminals are detected using wireless communication. • * 110560 The method of claim 2, wherein said step in which the proximity of these at least two wireless terminals is detected comprises steps in which: these at least two wireless terminals are transmitted in a group generation function state; and the proximity of wireless terminals is interrupted by sending from the first of these at least two wireless terminals a message to the second of these at least two wireless terminals via the wireless communication. A method according to claim 3, wherein the message contains information about the first wireless terminal that starts the process, as well as about the group formation. 10 The method of claim 3, wherein said step of transferring to the graph generation function state comprises the user of the wireless terminal performing with the wireless terminal a procedure which is one of the following: moving an electrode vai of said group generating function state from a menu in said wireless terminal and pressing a button. 15 The method of claim 1, wherein said step of detecting said physical contact between the users of these at least two treeless terminals comprises a step in which: a signal is transmitted via said physical contact between the users of these treeless. terminals. * · · -,: The method of claim 6, wherein said step of transmitting said sig: nai comprises steps in which: said signal is generated in one of these at least two wireless terminals; Said generated signal is transmitted to the body of the first user, the first user being the user of the wireless terminal that generated the signal,. And further to the body of the second user physically connected to it, the first user; and: "": the transmitted signal is detected in the other user's wireless terminal. The method of claim 6, wherein said signal includes a low frequency:. Signal. 1 The method of claim 8, wherein said signal frequency is below 1 MHz. 110560 The method of claim 6, wherein said signal includes the at least address of the transmitting wireless terminal and optionally at least one of the following: clock-offset information and device class. The method of claim 1, wherein said physical contact includes handshaking or any other contact between users, which allows a signal to pass between users. The method of claim 1, wherein said step of forming said group of the physically connected users of the at least two wireless terminals comprises a step in which: the formation of said group between the users of the wireless terminals is confirmed by sending a message to the a wireless terminal in the joke over the wireless communication. The method of claim 1, wherein each wireless terminal comprises a low power radio transmitter receiver for the wireless communication as well as an antenna. 15 The method of claim 6 or 7, wherein each wireless terminal comprises a PAN transmitter receiver and a touch electrode for generating and transmitting said signal to the user's body. The method of claim 1, wherein said group comprises at least three tree #. resolve user terminals. v \ 20 The method of claim 15, wherein said physical contact is a chain contact: wherein one of the users is physically connected to another of the users, and wherein it: * '': the second user is further in physical contact with a third user. The method of claim 15, wherein each of the users of the group is in physical contact with each other in forming the group. • · • ': 25 The method of claim 1, 15, 16 or 17, wherein, where the users are in physical. *, contact with each other, each user is also in contact with an electrode which further •; ; has a connection to the wireless terminal for each respective user. • · ·; 'T 19. Wireless communication terminal for group communication with at least one other wireless terminal, the terminal comprising: • I · 110560 a detection element for detecting the physical contact between the user of the wireless terminal and the user of the at least one other wireless terrain; means by which one participates in the formation of a group of the wireless terminal 5 and the at least one other wireless communication group terminal, which occurs with the at least one other wireless terminal of the formed group over a wireless connection; and a transmitter receiver for performing a wireless group communication in which the wireless terminal and the at least one other wireless terminal of the formed group participate. The wireless communication terminal of claim 19, wherein said transmitter receiver comprises a short-range radio transmitter receiver and an antenna. The wireless communication terminal of claim 19, wherein said detection means comprises a PAN transmitter receiver and an electrode for contact with the user's body. The wireless communication terminal of claim 21, wherein said detecting means further comprises a switch by which the transmission of a signal to the user's body is triggered when in said physical contact. • * · · • ·. The terminal of claim 19, wherein said physical contact includes • a handshake or any other contact between the users, which allows a weak electric current to pass from the first body of the first used the other body of the other user and which heist touch where the bodies can exchange digital information by capacitively coupling weak aa :: currents through said body. • .25 The terminal of claim 22, wherein said signal includes a low frequency signal. :. ·. The terminal of claim 24, wherein said signal frequency is about 100-1000 kHz.